Best 3PL Software (2026)

It's warehouse and logistics software built specifically for third-party logistics providers who manage fulfilment, storage and shipping on behalf of multiple client businesses. Unlike standard warehouse management software built for one company's own stock, 3PL software needs to segregate each client's inventory, orders and billing while still allowing efficient shared use of warehouse space, staff and equipment. It typically includes client-specific billing (storage fees, pick-and-pack charges, shipping markups) alongside the core warehousing and order fulfilment functions.

• Multi-client inventory segregation – each client's stock tracked and reported separately
• Client-specific billing rules – storage fees, handling charges and shipping markups per contract
• Client portal access – so clients can see their own stock and order status without calling you
• Order routing from multiple sales channels – pull orders from each client's own e-commerce or ERP
• Warehouse space and slotting management – optimise storage across shared warehouse space
• Automated invoicing to clients – based on actual storage and handling activity, not manual calculation
• SLA and performance tracking per client – measure fulfilment speed against contracted service levels
• Integration with carriers/shipping aggregators – for rate shopping and label generation across clients

Confirm billing automation actually reflects your real fee structure (storage per pallet or per day, handling per order, shipping markup), since manual invoice calculation across many clients becomes unmanageable quickly and errors damage client trust. Ask how easily a new client can be onboarded, since a system that requires heavy configuration for every new account will slow your growth. Check whether clients get self-service visibility into their own stock and orders, since that reduces the support burden of clients calling for status updates you could otherwise show them directly.

Ask the vendor to set up a sample second client in the demo and show how inventory and orders stay cleanly separated from the first. Check how billing is generated and whether it matches typical 3PL fee structures like storage, pick-and-pack and shipping markup. Ask about the client portal experience, since that's often what wins or loses new client accounts for a 3PL provider. Confirm integration with the shipping carriers and sales channels your clients actually use.